dc.description.abstract | This research was conducted to determine potency of Rianiate geothermal as an alterntivesource and determine the types of Rianiate geothermal that was begun with the position’smeasurement by using GPS (Global Position System). Then, the measurement or directobservation characteristics of chemist and phisics such as pH, surface’s temperature, colour etc.The following step is taking sampel in four water source in which its other chemical nature to bemeasured by titrimetry method, cromatography and by using the equipment of mercury’s analyzer(AAS), XRD and also Cromathology gas. In analyzing the data, the counting of temperature ofsubsurface was done by using geothermometer and ended by potency’s counting. The positionof the four water source are in about N : 020 31,852’ and E : 0980 44, 021’ where the height fromsea’s surface (dpl) : 958 m. The highest surface’s temperature is 800 C and the temperatureunder soil is about 130,50 C describing the average geothermal. The calculation of the content’samount of Clorida ion, Sulphate, Bicarbonate, includes the clorida. The trilateral diagram Na/1000– K/100 - √Mg of hot water is in the area of immature water. From the calculation of Indonesia’sStandardized Geotherm, it can be obtained that the estimated back up potency of Rianiategeotherm is 2,68 Mwe | en_US |